Nozzle for the discharge of liquids



Sept. 11, 51.951 T. A. HENSHAW NOZZLE FOR THE DISCHARGE OF LIQUIDS FiledMarch 5, 1948 1 0% 5 .wa d 9 1W n h i 9 pp 24 Q 5 2 1 6 3d b P L A 1 a a2 1 no 2 dv d 5 Illlllllli-llll! Patented Sept. 11, 1951 NQZZLE FOR THEDISCHARGE oF- LIQUIDS Thomas A. Henshaw, Elland, England, assignor to-Nu.-Swift,,Limited-, London, England Application March 5, 1948; SerialNo. 133137 In GreatBr-itain Marchll, 1947 Myrinventiorrin-orr ating tonozzles for the discharge of liquids has particular reference tonozzles'iior the discharge of liquidfire-extinguishing media; but anozzleaccording. to or embody ing the invention. is, aswillsbezapparentirom the description to be hereinafter given, applicablewith advantage for-other purposes.

object of the invention is to provide an. improved constructionof nozzledesigned: to give, at -will, a. discharge in' theiorm of a jet, or of a.spray, or what may be termed a fog or mist, that istosay a spray-ofexceedingly finedivision.

A further object is to provide a nozzle of such construction. that even:when dealing with flows; of largeavolume and at high pressure the changefrom: one form of discharge toanother can be made with a minimumof'efiort;

My-improved nozzle is characterized: by the interposition between. theconduit through. which the liquid. to be discharged is led to thenozzle, andwhat may beter-med a circumferentially-ad-.. justabledischarge-controller,- of a flexible dia-. phragm. formed with a serieof openings into, or away from, completeor partial coincidence withwhicha series of passages through the discharge controller can be brought;the openings in the flexible-diaphragm being so disposed and thepassages through the discharge controller being so formedthat byappropriate circumferential ad'- justment or rotation of the controllereither a solid jet, or a spray of anydesired' fineness down towhat maybe termed a mist or fog'can be discharged. It maybe arranged that at alltimes apassage-way, preferably'centrally disposed, will beaffordedthrough the flexible diaphragm and discharge controller; inwhich casethe nozzle will be incapable of use as a shut-off valve; Ii?such a valve is required it maybe included in the-pipe orconduit leadingto the discharge nozzle, or alternatively the passages in the dischargecontrollermay be so disposed that'the discharger itself constitutes asimple shut-off valve.

In the accompanying drawing,

Fig. l is a sectional elevation of a. nozzle ac! cording to oneembodiment oftheinvention; and

Fig; 2. is a similarview to Fig. 1, but having the section taken onadifierentplane;

Fig. 3' is an end view of the nozzle, looking; in the, direction of thearrow 3 in Fig. 1;

Fig. 4 is; a diagram showing'a somewhat different arrangement, oftheports or passages from. that in the-nozzle shown in Figs. 1-3.

Referring to the drawings, and firstly to Figs. 1- to. 3, a'represents anipple adapted to be. s6.-

eured on the end oia delivery pipe, and lrwhalir 5 Claims. (Cl. 299 141)maybe; termed a retainin m mb rew don to the nipple a. and havingashoulder b between which; and the extremity of the nipple there isclamped; the peripheral portion of a flexible diaphragm; c ofsuitablematerial, having a central; opening 0 and other openings 0 c 0and: 0 which will be refer-red to later:

Onthe outer side oi thediaphragm c is a part (1; which; we shall; referto asa rotatable drum.

This drumis held to the nipple a by means of an inwardly-extendingflange b on the retaining: member b, said flange actingthroughball-thrust bearing eon a collar screwed on to the inner end of the drumd. In, the case of a relatively small nozzle the ball-thrust bearing emay be omitted or, it may be. replaced by a simple ,bear-.

The drum d has a central passage-way d: and, in the illustratedembodiment, six circumferentiallyaspaced passages d d d d 11?; and:- d";which extend parallel to the central passage 12'. The passages. d and dare turned inwardly at their outer ends and lead at. diametrically-opeposed points into the central passage d as shown in Fig. l. The otherfour passages. d (1 d and d of the drum. are furnished at their outerends, as shown in Fig. 2, with removable nipples g each having two smallorifices g and p inclined towards one another at a'suitable angle.

If the drum d is rotated to a position in which the passages d and d arealigned with the -open-. ings a and 0. in the flexible diaphragm c,streams of; water flow, along the said passages and on. emerging from.the inwardly-directed outer ends,-

of the passages strike the central jet emerging from the central passaged and break it up. into.

spr y.

If; the drum is rotated to a position in which its passages d d (1 and dare aligned with the, openings 0?, c and c in the diaphragm c-, thepassages d and'd are closed and Water flows through the, passages d d dand d to be converted into a very fine mist or fog by means of the:nipples c. There is thus provided around the. central jet emerging fromthe passages d ashield of mist; or fog which serves to protect theopera.

ator handling the nozzle.

If the drum is rotated to a position in which;

all its passages 'd -d7 are out of alignment with the openings c -c ofthe diaphragm c a solid central jet only is provided.

The drum dmaybe provided with a handle, hand wheel, projection orprojections, or be otherwise suitably fashioned to facilitate its ro-.

ailiqni The flexible diaphragm acts as a seal to prevent leakage throughsuch passages in the drum as it is desired to close, the pressure of theliquid assisting to make the seal. 7

The nipples g are made removable for purposes of cleaning andinspection. In order to prevent clogging of the relatively fine outletsof the nipples a filter in the form of a sheet of fine gauze may beinserted behind each filter as indicated at h in Fig. 2.

An advantage of the construction shown in Figs. 1 to 3 is that aconstant outlet is provided through the nozzle even if the spray or fogpassages become clogged up.

In Fig. 4 an arrangement is shown in which what we have termed thecentral opening in the diaphragm and the central passage in therotatable drum are offset from the centre. In the diagram the openingsof the flexible diaphragm are indicated in broken line and those of therotatable drum in full line. As will be seen from the diagram therotatable drum can be positioned so that all its passages are closed,the drum thus acting as a shut-off valve. By appropriate rotation thepassages (1 -11 can be positioned opposite the openings -0 of thediaphragm, leaving the passage 11 closed and thus providing fog or mistonly. In another position of the drum the passage d can be opened up aswell as the passages d -d" thus providing a solid jet surrounded by fogor mist.

In still another position the passage d alone can be opened up thusaffording only a solid jet whilst in another position the passage 01'and the passages d and d, can be opened up thus affording a spray. Therotatable drum in this embodiment constitutes, as will be seen, a simpleshut-on" valve.

If desired, either the spray passages d and d or the fog passages d -d",or the jet passage (1' may be omitted.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. A liquid discharge nozzle, comprising in combination, a nippleadapted to be secured to the end of a liquid discharge pipe; a retainingmember secured to said nipple, the said retaining member having acentral outlet channel; a diaphragm disposed across said central outletchannel; a central opening provided in said diaphragm; a series ofangularly spaced openings arranged in said diaphragm around said centralopening; a single rotatable drum held on said retaining member forrotation relatively thereto and with one end face in contact with saiddiaphragm; a central passageway provided in said drum; a series ofcircumferentially spaced passages provided around said centralpassageway in said drum and extending parallel to said centralpassageway, at least two of said passages being turned inwardly at theirouter ends and leading at diametrically opposite points into saidcentral passageway; and means associated with said drum forming smallangularly directed outlet orifices of a narrowed diameter at the outerends of the other of said passages whereby in one position of the drumliquid is permitted to pass only through the central passageway of thedrum, in another position liquid is permitted to pass through thecentral passageway of the drum and through the passages of the drum, theouter ends of which lead at diametrically opposite points into thecentral passageway of the drum, while in a third position of the drumliquid is permitted to pass through the central passageway of the drumand through these passages through the drum, the outer ends of whichregister with the angularly directed orifices.

2. A liquid discharge nozzle, comprising in combination, a nippleadapted to be secured to the end of a liquid discharge pipe; a retainingmember secured to said nipple, the said retaining member having acentral outlet channel; a diaphragm disposed across said central outletchannel; a central opening provided in said diaphragm; a, series ofangularly spaced openings arranged in said diaphragm around said centralopening; a single rotatable drum held on said retaining member forrotation relatively thereto and with one end face in contact with saiddiaphragm; a central passageway provided in said drum; a series ofcircumferentially spaced passages provided around said centralpassageway in said drum and extending parallel to said centralpassageway; and means associated with said drum forming small angularlydirected outlet orifices of a narrowed diameter at the outer ends of theother of said passages whereby in one position of the drum liquid ispermitted to pass only through the central passageway of the drum whilein another position liquid is permitted to pass through the centralpassageway of the drum'and through the passages, the outer ends of whichregister with the angularly directed orifices.

3. A liquid discharge nozzle, comprising in combination, a nippleadapted to be secured to the end of a liquid discharge pipe; a retainingmember secured to said nipple, the said retaining member having acentral outlet channel; a diaphragm disposed across said central outletchannel; a central opening provided in said diaphragm; a series ofangularly spaced openings arranged in said diaphragm around said centralopening; a single rotatable drum held on said retaining member forrotation relatively thereto and with one end face in contact with saiddiaphragm; a central passageway provided in said drum; a seriesofcircumferentially spaced passages provided around said centralpassageway,.at least two of said passages being turned inwardly at theirouter ends and leading at diametrically opposite points into saidcentral passageway; nipples removably associated with said drum acrossthe outer ends of the other of said passages; and small angularlydirected orifices formed in said nipples whereby in one position of thedrum liquid is permitted to pass only through the central passageway ofthe drum, in another position liquid is permitted to pass through thecentral passageway of the drum and through the passages of the drum, theouter ends of which lead at diametrically opposite points into thecentral passageway of the drum, while in a third position of the drumliquid is permitted to pass through the central passageway of the drumand through these passages through the drum, the outer ends of whichregister with the angularly directed orifices.

4. A nozzle constructed in accordance with claim 1 wherein the saidretaining member and drum are provided with overlapping flanges andwherein a bearing is disposed between said overlapping flanges to permitrotation of said drum.

5. A liquid discharge nozzle, comprising in combination, a nippleadapted to be secured to the end of a liquid discharge pipe; a retainingmember secured to said nipple, the said retaining member having acentral outlet channel; a diaphragm disposed'across said central outletchannel; a

central opening provided in said diaphragm; a series of angularly spacedopenings arranged in said diaphragm around said central opening; asingle rotatable drum held on said retaining member for rotationrelatively thereto and with one end face in contact with said diaphragm;a' first passageway provided in said drum, the said first passagewaybeing offset relatively to said first opening in said diaphragm; aseries of circumferentially spaced passages provided around said firstpassageway in said drum and extending parallel thereto, at least two ofsaid passages being turned inwardly at their outer ends and leading atdiametrically opposite points into said first; and means associated withsaid drum forming small angularly directed outlet orifices of a narroweddiameter at the outer ends of the other of said passages, whereby in oneposition of the drum liquid is permitted to pass only through the firstpassageway of the di' um, in another position liquid is permitted topass through the first passageway of the drum and through the passagesof the drum, the outer ends of which lead at diametrically oppositepoints into the first passageway of the drum, while in a third positionof the drum liquid is permitted to pass through the first passageway ofthe drum and through these passages through the drum, the outer ends ofwhich register with the angularly directed orifices.

THOMAS A. HENSHAW.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 170,397 Reid Nov. 23, 1875592,447 Richardson Oct. 26, 1897 686,966 Grouvelle et a1 Nov. 19, 19011,747,670 Hull Feb. 18, 1930 2,043,714 Schellin June 9, 1936 2,342,050Hurst Feb. 15, 1944 2,364,848 Hurst Dec. 12, 1944 2,401,782 Weller, JrJune 11, 1946

